na INLIS000000000012606 20210520151947 210520||||||||| | ||| |||| || | 0-8213-0652-9 010-0521012606 en 63/RES 63/RES Michael M. Cernea John K. Coulter John F.A. Russell RESEARCH-Extension-Farmer : A Two-Way continuum for agricultural development Washington DC The World Bank 1985 xvi, 171 p.: ill.; 28 cm. EXTENSION -- AGRICULTURE RESEARCH -- FARMER 150/ATA/1989